Calculadora de Argamassa
Descubra a quantidade exata de argamassa colante necessária para a sua obra de revestimento cerâmico ou porcelanato. Informe as dimensões, o tamanho da peça, a desempenadeira dentada e a argamassa para estimar sacos, peso e custos.
Standard starting recommendation for 12×24 porcelain tile to ensure minimum 80% to 95% mortar coverage.
Como Usar a Calculadora de Argamassa
Obtenha um cálculo confiável em 6 passos práticos — Modo Rápido para reformas simples e Modo Pro para instaladores.
1. Medição da área de assentamento
Informe comprimento × largura, digite a metragem quadrada direta ou some vários cômodos.
1. Medição da área de assentamento
Informe comprimento × largura, digite a metragem quadrada direta ou some vários cômodos.
2. Seleção do tamanho do revestimento
Escolha formatos padrão (pastilha, 30×30, 60×60, 60×120 cm) para determinar os dentes da desempenadeira.
3. Escolha da desempenadeira
Aproveite a recomendação automática conforme a norma ou selecione sua ferramenta.
4. Seleção da argamassa colante
Selecione argamassa AC-II / AC-III flexível ou produtos de marcas reconhecidas.
5. Adição de perdas e recortes
Acrescente de 10% a 15% para cortes e ative a dupla colagem para grandes formatos.
6. Resumo de sacos e água
Obtenha a quantidade de sacos inteiros arredondada para cima e o volume de água em litros.
Quanta Argamassa Preciso Comprar?
A standard 25 kg / 50 lb bag of thinset covers between 35 and 95 sq ft (3.5 to 9 m²) depending heavily on the trowel notch size:
Room Size to Bag Estimator
Key Factors Determining Real Mortar Usage:
A 12 mm notch applies more than double the volume of a 4 mm notch.
Mandatory for tiles > 15 inches to achieve 80-95% coverage (+15-20% mortar).
Lightweight polymer mortars cover identical surface area with less weight.
Uneven screeds and uncoupling membranes absorb extra mortar.
Tabela de Rendimento de Argamassa
Official coverage benchmarks per 25 kg / 50 lb bag across trowel tooth geometries.
1/2" × 1/2" Square Notch
Essential for achieving ANSI 80% (dry) and 95% (wet) bond contact.
| Trowel Notch | Profile | Typical Application | Coverage / Bag | Usage (kg/m² or lb/sq ft) |
|---|---|---|---|---|
| 4 mm / 3/16" V-Notch | V-Notch | Mosaics, glass tile, small wall tiles | 8.5 – 10.5 m² (85-100 sq ft) | ~2.4 – 2.8 kg/m² |
| 6 mm / 1/4" Square | Square | Tiles up to 20×20 cm (8×8"), subway wall tiles | 7.0 – 8.5 m² (75-90 sq ft) | ~2.8 – 3.5 kg/m² |
| 8-10 mm / 3/8" Square | Square | Floor tiles 30×30 cm (12×12"), pavers | 5.0 – 6.5 m² (50-65 sq ft) | ~3.8 – 5.0 kg/m² |
| 12 mm / 1/2" Square | Square | Large format 30×60, 60×60 cm (LFT) | 3.5 – 4.5 m² (35-45 sq ft) | ~5.5 – 7.0 kg/m² |
| 15 mm / 3/4" U-Notch | U-Notch | XXL porcelain panels, natural stone | 2.8 – 3.5 m² (28-35 sq ft) | ~7.0 – 8.8 kg/m² |
| Euro Slanted Notch | Slanted | Heated floors, outdoor terraces, slabs | 3.0 – 4.0 m² (30-40 sq ft) | ~6.0 – 8.0 kg/m² |
Guia de Desempenadeiras Dentadas
Match your tile dimensions to the recommended notch size and compressed bed thickness:
| Tile Size | Tile Type | Notch Size | Profile | Compressed Bed | Usage Rate |
|---|---|---|---|---|---|
| Mosaics (1" - 2") | Glass / Ceramic | 4 mm / 3/16" | V-Notch | ~1.5 mm | Low consumption Prevents squeeze out into grout joints. |
| Subway & Wall (4×4) | Glazed ceramic | 6 mm / 1/4" | Square | ~2.0 mm | Moderate Provides non-sag vertical hold. |
| Floor 30×30 cm (12×12) | Porcelain / Ceramic | 8 mm / 3/8" | Square | ~3.0 mm | Standard Straight line troweling pattern. |
| Large Format 30×60 cm (12×24) | Rectified porcelain | 12 mm / 1/2" | Square / U | ~4.0 mm | High Back-buttering mandatory for 80%+ contact. |
| Large Square 60×60 cm (24×24) | Polished porcelain | 12 mm / Euro | Euro / U | ~4.5 mm | Very high Requires medium-bed non-slump mortar. |
| Wood Plank (20×120 cm) | Plank porcelain | 12 mm / Euro | Slanted | ~4.5 mm | Very high Install with max 33% offset to prevent lippage. |
| Uncoupling Membrane (DITRA) | Polyethylene mat | 4 mm / 3/16" | V / Square | ~1.5 mm under mat | Separate coat (~15 m²/bag) Follow membrane manufacturer specifications. |
Consumo por Dimensão do Revestimento
Recommended trowel size, average coverage and installation criteria by format:
Mosaics & Sheets
Up to 5×5 cmThin bed prevents squeeze-out between small joints.
Subway & Wall Tiles
7.5×15 to 10×30 cmNon-sag thixotropic hold on vertical walls.
Standard 30×30 cm
30×30 cm (12×12")Classic format with easy bed leveling.
Large Format 30×60 cm
30×60 cm (12×24")Back-buttering mandatory to eliminate hollow spots.
Large Square 60×60 cm
60×60 cm (24×24")Heavy tiles require high bond strength.
Wood-Look Planks
20×120 cmInstall with max 33% offset to prevent lippage.
Gauged Porcelain Panels
120×260 cm+Requires 2-person handling with vacuum suction cups.
Qual a Espessura da Argamassa Sob o Piso?
A common misconception is assuming trowel notch height equals final bed thickness under installed tile.
Tile Embedment & Ridge Collapse
Adjust Embedment Pressure:
Uncompressed ridges leave 50% hollow air channels. Sliding tile collapses ridges into a continuous void-free structural bed.
Fresh Combed Ridges
Troweled at 45 degrees leaving open air channels.
Tile Pressed & Shifted
Ridges collapse sideways expelling air pockets.
Fully Cured Bed
Solid rock-like bond after cementitious hydration.
Q Can I use thinset to level 15 mm of floor unevenness?
Limit AlertNo. Standard thinset shrinks if applied over 5 mm (1/4"). Use self-leveling underlayment or specialized medium-bed mortar.
Q How to calculate total floor elevation for doors?
Failure RiskTile thickness + compressed mortar bed + membrane = total elevation (typically 14 to 18 mm).
Guias Visuais e Árvore de Decisão ANSI
Explore 5-layer uncoupling membrane anatomy and select the right ANSI / EN standard for your project.
5-Layer Membrane Installation Anatomy
Click any layer of the uncoupling assembly below to inspect manufacturer specifications and coverage rules:
Absorbs substrate shear movements.
Mortar Specification Wizard
Select 3 parameters to determine the exact mortar classification:
Modified Large and Heavy Tile (LFT) Mortar
Porcelain large-format tile requires high-polymer modified mortar with non-sag HT performance.
Recomendações por Ambiente
Moisture exposure and traffic conditions alter mortar requirements:
Shower Walls & Cubicles
Eliminate hollow pockets to prevent moisture accumulation.
Walk-in Shower Floors
Follow slope smoothly toward central drain.
Kitchen Backsplash
Non-sag paste or mortar keeps tiles aligned.
Living & Hallway Floors
Supports heavy furniture and foot traffic.
Radiant Heated Floors
Air pockets act as insulation, blocking heat transfer.
Outdoor Patios & Terraces
Trapped water freezes and cracks tiles.
Swimming Pools & Fountains
Resistant to chemical chlorine and hydrostatic pressure.
Commercial Retail Floors
Prevents point-load tile cracking under cart wheels.
Requisitos por Tipo de Contrapiso
Substrate porosity, flexibility and moisture movement guide prep and adhesive choice:
Subfloor Deflection Gauge
TCNA requires subfloors to deflect no more than L/360 for ceramic/porcelain and L/720 for natural stone under full live loads:
Concrete Slab / Screed
The most rigid and stable base for tile.
Cement Backer Board (CBU)
Standard waterproof backing for showers and bathrooms.
Plywood / Wood Subfloor
Wood moves with humidity; avoid direct bond without membrane.
Uncoupling Membrane (DITRA)
Isolates floor cracks so they never transfer to tile.
Tile-Over-Existing-Tile
Saves demolition dust and time during renovations.
Drywall / Gypsum Board
Suitable only for dry rooms without water spray.
Fatores que Alteram o Rendimento
On real jobsites, physical conditions deviate from theoretical lab numbers:
Trowel Angle & Pressure
Troweling at 60 degrees forms full ridges, while a flat 45-degree angle reduces thickness.
Tile Back Waffle Pattern
Deep grooves on tile undersides consume mortar to fill hollows.
Substrate Unevenness
An unlevel floor forces the setter to thicken the mortar bed.
Mandatory Back-Buttering
Applying a flat contact skim to large tiles reduces coverage per bag.
Temperature & Air Drafts
Summer heat skins over mortar in the bucket prematurely.
Residue on Bucket & Tools
Mortar adhering to mixing paddles and pail walls.
Diagonal Layout & Cuts
Creates extra perimeter cuts and adjustments.
DITRA Membrane Cavities
Filling square dovetail pockets takes extra mortar volume.
80% vs 95% Mortar Contact Rule
Minimum bond contact requirements to prevent cracked or debonded tiles:
For dry interior floors, at least 80% of tile back must be supported with continuous mortar bed.
2-Step Mortar Calculation for Schluter DITRA
Installing uncoupling membranes requires calculating 2 separate mortar coats:
For 20 m² with DITRA, you need ~1.5 bags for the mat + 5 bags for tiles = 7 bags total.
Normas e Classificações Técnicas
International performance classifications explained clearly:
Standard Mortar
For porous ceramic tiles on rigid concrete.
Polymer-Modified Thinset
Industry standard for porcelain and indoor floors.
Deformable Flex Mortar
For large format tiles and heated screeds.
Highly Deformable Super-Bond
For pools, wood floors, facades and gigantic slabs.
Mechanical Strength Comparison
Click any classification below to dynamically compare shear bond strength, flexural tolerance, and polymer concentration:
| Material | Chemical Base | Best Application | Wet / Exterior Safe | Price Tier |
|---|---|---|---|---|
| Standard Thinset | Portland Cement + Polymer | Universal floor and wall | Yes / Excellent | $$ (Standard) |
| Medium-Bed Mortar | Coarse aggregate cement | Tiles > 15" & leveling | Yes / Recommended | $$$ (Medium) |
| Super-Bond (S2) | Elastomeric polymer | Pools, terraces, wood | Yes / Maximum | $$$$ (Premium) |
| Tile Mastic (D2) | Water-based acrylic paste | Kitchen backsplashes only | No (dissolves in water) | $$ (Ready mix) |
| Epoxy Mortar (R2) | 2-Part epoxy resin | Commercial kitchens, spas | Yes / Impermeable | $$$$$ (Highest) |
Como Misturar Argamassa e Calculadora de Água
Correct mixing ensures polymers develop maximum shear bond strength:
1. Add Water to Pail First
Always pour clean cold water into the bucket first, then add powder gradually to prevent dry clumps at the bottom.
2. Mix at Low Speed (3–5 min)
Use a drill under 500 RPM. High speed traps air bubbles that weaken tensile bond strength.
3. 10-Minute Slake Time (Mandatory Rest)
Let mortar rest undisturbed for 10 minutes so polymers activate chemically.
4. Remix for 1 Minute – Ready!
Remix for 1 minute without adding any extra water, even if it feels thicker.
Calculadora de água para frações de saco
Calculate exact water in liters or quarts for partial batches:
Warning: Excess water ruins bond strength and causes hollow tiles.
Exemplos Práticos de Cálculo
Real project scenarios with transparent math. Click 'Load this room' to try:
Powder Room (30×30 Ceramic)
A single bag easily covers powder rooms.
Kitchen Backsplash (Subway Tile)
Non-sag wall mortar.
Master Bath (30×60 LFT)
Back-buttering requires 4th bag.
Walk-in Shower (Floor & Walls)
High-flex waterproof mortar required.
Open Kitchen with DITRA
Double layer application for membrane.
Basement Floor (60×60 Porcelain)
Pallet delivery recommended for this quantity.
Whole House (Plank Porcelain)
Long planks produce more offcut waste.
Commercial Restaurant Floor
C2 S1 heavy duty commercial bond.
Banco de Dados de Argamassas e Fabricantes
Verified coverage benchmarks and water ratios directly from official Technical Data Sheets (TDS):
| Product & Manufacturer | Standard Class | Yield 6 mm (1/4") | Yield 12 mm (1/2") | Water Ratio | Data Sheet |
|---|---|---|---|---|---|
| Generic Polymer-Modified Thinset (ANSI A118.4) Generic / Standard Industry Average 50 lb bag | ANSI A118.4 / A118.11 | 82.5 sq ft | 45 sq ft | 5–6 qts | Ficha técnica (TDS) ↗ |
| MAPEI Ultraflex 2 Professional Tile Mortar MAPEI 50 lb bag | ANSI A118.4, ANSI A118.11 | 82.5 sq ft | 41.5 sq ft | 5–6 qts | Ficha técnica (TDS) ↗ |
| MAPEI Ultraflex LFT Large Format Mortar MAPEI 50 lb bag | ANSI A118.4HT, ANSI A118.11 | 70 sq ft | 40 sq ft | 5.5–6 qts | Ficha técnica (TDS) ↗ |
| Custom VersaBond Fortified Thin-Set Mortar Custom Building Products 50 lb bag | ANSI A118.4, ANSI A118.11 | 90 sq ft | 44.5 sq ft | 5.5–6 qts | Ficha técnica (TDS) ↗ |
| Custom VersaBond LFT Large Format Mortar Custom Building Products 50 lb bag | ANSI A118.4HT, ANSI A118.11 | 75 sq ft | 38.5 sq ft | 5.5–6 qts | Ficha técnica (TDS) ↗ |
| LATICRETE 254 Platinum Multipurpose Thin-Set LATICRETE 50 lb bag | ANSI A118.15, ANSI A118.4, ANSI A118.11 | 87.5 sq ft | 43.5 sq ft | 5.25–5.75 qts | Ficha técnica (TDS) ↗ |
| LATICRETE 253 Gold Modified Thin-Set LATICRETE 50 lb bag | ANSI A118.4, ANSI A118.11 | 85 sq ft | 41.5 sq ft | 5–5.5 qts | Ficha técnica (TDS) ↗ |
| Schluter ALL-SET Specialized Tile Mortar Schluter Systems 50 lb bag | ANSI A118.4T, ANSI A118.11, ANSI A118.15T | 80 sq ft | 38.5 sq ft | 4.75–5.25 qts | Ficha técnica (TDS) ↗ |
| ARDEX X 5 Flexible Tile and Stone Mortar ARDEX 40 lb bag | ANSI A118.4, ANSI A118.11 | 70 sq ft | 34 sq ft | 4.5–5 qts | Ficha técnica (TDS) ↗ |
| TEC Full Flex Premium Polymer-Modified Mortar TEC (H.B. Fuller) 50 lb bag | ANSI A118.4, ANSI A118.11 | 81.5 sq ft | 40 sq ft | 5–5.5 qts | Ficha técnica (TDS) ↗ |
Calculadoras por Marca
Each proprietary formulation yields slightly different square meter rates:
MAPEI
C2 TE S1 / ANSI A118.15Ultraflex 2, Ultraflex LFT, and Ultralite lightweight mortars.
LATICRETE
Super-Bond A118.15254 Platinum, 253 Gold, and 4-XLT high performance.
Custom Building Products
Industry StandardVersaBond, VersaBond LFT, and FlexBond standard.
Schluter Systems
DITRA & KERDI SystemALL-SET, FAST-SET, and DITRA-SET uncoupling mortars.
ARDEX
Lightweight TechnologyX 5, X 77 Microtec, and X 78 high-yield formulations.
TEC (H.B. Fuller)
Commercial GradeFull Flex, 3N1 Performance, and LFT mortars.
Bostik
Polymer FortifiedBostik PM, Single-Flex, and Hydroment polymer thinsets.
Perguntas Frequentes
Authoritative answers grounded in ANSI standards, TCNA guidelines, and manufacturer specifications.